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Twist Calculation using Twist Multiplier

Calculate Twist per inch (TPI) / Twist per meter (TPM) for a yarn based on Twist Multiplier (TM) and yarn linear density

Twist per meter (TPM)
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Twist per inch (TPI)
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Method and formula

Twist per inch (TPI)=Twist Multiplier (TM)×NeRecommended TM Values: Knitting: 3.2 - 3.8 Weaving: 3.8 - 4.8 Denim: 4.0 - 5.2 Lycra: 4.8 - 5.5\text{Twist per inch (TPI)} = \text{Twist Multiplier (TM)} \times \sqrt{Ne} \\[1em] \text{Recommended TM Values:} \\ \text{ Knitting: 3.2 - 3.8} \\ \text{ Weaving: 3.8 - 4.8} \\ \text{ Denim: 4.0 - 5.2} \\ \text{ Lycra: 4.8 - 5.5}

Input variables

VariableExpected entry
Twist Multiplier (TM)Enter a positive measured value.
Yarn Linear DensityEnter a positive measured value.
Linear Density unitChoose: Ne, Nm, Tex, Denier, Dtex

Calculation workflow

  1. Enter the measurements in the displayed units.
  2. Check the selected yarn, fiber, weave, or trade unit where shown.
  3. Review each calculated output and its unit.
  4. Use Copy results to save the displayed values to recent history.

Outputs

  • Twist per meter (TPM)
  • Twist per inch (TPI)